Heavy duty rod grizzly



April 30, 1957 L.. G. sYMoNs HEAVY DUTY ROD GRIZZLY 6 Sheets-Sheet 1 Filed Jan. 7, 1953 Obbl. n(

April 30, 1957 L.. G. sYMoNs HEAVY DUTY Ron GmzzLY eshets-sheet 2 Filed Jan. 7, 1953 6 Sheets-Sheet 5 April 30, 1957 l.. G. sYMoNs HEAVY DUTY ROD GRIZZLY Filed Jan. 7, V1953 April 30, 1957 I l.. G. sYMoNs 2,790,552

HEAVY DUTY ROD GRIZZLY Filed Jan. 7, 1953 6 Sheets-Shes?I 4 f 55 A A 52 nyenzar Lor 7? iymans y April 30, 1957 L. G. sYMoNs HEAVY DUTY ROD GRIZZLY 6 Sheets-Sheet 5 Filed Jan. '7, 1953 fifa/ways April 30, 1957 l.. G. sYMoNs HEAVY DUTY ROD GRIZZLY 6 Sheets-Sheet 6 Filed Jan. 7, 1955.

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HEAVY DUTY RD GRIZZLY Loren G. Symons, Hollywood, Calif., assignor to Nordberg Manufacturing Company, Milwaukee, Wis., a corporation of Wisconsin Application January 7, 1953, Serial No. 330,068

6 Claims. (Cl. 209-395) My invention relates to an improvement in screens and has for one object a new and improved heavy duty vibrating screen of the bar or rod type.

Another object of my invention is a new and improved vibrating screen for separating materials with particles of various sizes.

Another object of my invention is a vibrating screen for making any desired number of separations of the particles.

Another object of my invention is a new and improved vibrating screen of the bar or rod type which will perform satisfactorily under severe operating conditions.

Another object of my invention is a vibrating screen with a screen deck composed of sections of arched screening rods.

Another object of my invention is a vibrating screen1 with a screen deck composed of what might be termed larger or heavy duty rods.

Another object of my invention is a screen with a new and improved method and means for arching and liexing the screening rods or bars in the sections of the screen deck.

Other objects will appear from time to time in the ensuing specification and drawings, in which:

Figure 1 is a perspective view of my new and improved rod screen; Y

Figure 2 is a side View in section of my rod screen;

Figure 3 is a partial side View in section of the connection between two adjacent rod sections;

Figure 4 is a sectional view along line 4 4 in Figure 2;

Figure 5 is a sectional View along line 5-5 in Figure 3;

Figure 6 is a sectional View along line 6 6 in Figure 7;

Figure 7 is a side View of the clamping mechanism shown in Figure 6; and

Figure 8 is aside view in section, similar to Figure 2, showing one stage during the insertion of the rods in the various deck sections. j

In Figures 1 and 2, my screen is composed of a frame, or housing, indicated generally at 10, which has two side walls or plates 12, and two end walls, a forward wall 14 and a rear wall 16. As shown in Figure 1, the side walls 12 are provided with a suitable number of reinforcing members 1S, which extend vertically along and are welded to the side walls.A A base 2t) underlies the side walls 12, which are welded or otherwise suitably secured thereto, the base extending a short distance beyond the side walls,

as shown in Figure l. In Figure 2, the base abuts the' forward and rear Walls 14 and 16 and is suitably secured thereto. YAngle irons 22 and 24 are secured, respectively, to the forward and rear wall so as to constitute, in elfect, extensions of the base.

The top of the frame or housing, designated generally at 26, has pivoted inspection plates or covers 28, which aiford access through the top of the housing to the rod deck, to be described hereinbelow. The forward end of the top of the housing is provided a feed chute or box-like structure 39 through which the material to be screened is poured. The rear wall 16 and top 26 are connected by Patented Apr. 30, 1957 a diagonal wall 32, which is positioned at approximately a 45 degree angle with respect to wall 16 and top 26 and, as shown in Figure 1, has an opening 33 through which access can be had to the deck, the vibrating mechanism and their associated parts, to be described hereinbelow. The opening 33 may have a removable cover, if desired.

A llexible coupling or yieldable support, designated generally at 34 in FigureZ, is connected to angle irons 36 secured to the side Walls 12 in an appropriate manner. As this flexible coupling forms no part of the present invention and is similar in detail to the one shown and described in Patent No. 2,299,661, it has not been alluded to in detail. Through appropriate mechanism, the exible coupling 34 is connected to a forward plate 37 which is secured between the ends of a pair of side plates 38, each of which resides adjacent but slightly inboard of the side walls 12. The side plates 38 are connected `at their other end and supported by a yieldable support, indicated generally at 4G in Figures 1 and 2, these supports being composed of a suitable number of coil springs which rest on appropriate supporting an attaching mechanism on the side walls l2. As shown in Figure 2, the lower edge of each of the side plates is curved and slanted downwardly from left to right, and suitably supported between the two plates, and adjacent this curved edge is a rod deck, indicated generally at D. The side plates and the forward plate with the rod deck D form what might be termed an inner or vibrating frame which is supported at one end on the flexible coupling 34 and at the other end on the yieldable support 40. It should be noted that the vibrating or inner frame is connected to, as well as supported by, the flexible coupling 34.

`Indicated generally at V in Figure 2, I provide a suitable vibrating mechanism which is supported by the main frame or housing lll and which extends through the side plates 38 of the inner vibrating frame. As the details of this vibrating mechanism form no part of the present invention, I have not described it in detail and, as shown, it is positioned slightly above the yieldable support 40 and between said support and the flexible coupling 34. An appropriate power mechanism M is provided on the diagonal wall 32 to drive the vibrating mechanism.

As all of the previous mechanism is considered conventional and does not form a specific part of the invention, it has not been fully described with reference to details. For additional information on this structure, attention is directed to U. S. Patents No. 2,192,278 and 2,321,166.

The screendeck D is composed of sections. In Figure 2, I have shown three such sections, denoted generallytlexing and clamping mechanism A-2 and a foot end F.,

With regard to the rod section S-1, the head end H is composed of a top plate 42 which extends transversely across the rod deck R and is secured on each side to the side plates 38 in any appropriate manner. A V-shaped bracket or rod end positioning member 44, which extends between the side plates 38, carries on its upper surface a channel piece 46. The lower sideV of the top plate 42 has an abutting plate 48 which is positioned adjacent the forward edge of the channel piece 46. A resilient cushion 50 is carried by the channel piece 46, and as shown in Figure 2, is enclosed on three sides bythe channel piece, t

the abutting plate, and the top plate. This cushion, or resilient support Sli, may be made of any resilient or rubber-like material and has a plurality of openings or apertures passing through it and appropriately spaced so` as toV 'e'c'eive the forward end of the rods in the rod section Spaced equally between the headv end H and the first flexing and clamping mechanism A-1 are at least two approximately identical intermediate supports or positioning members 52. Each of these supports, as shown in detail in Figure 3, is composed of a pair of side plates 5e connected to the side plates 38 of the vibrating frame by a plurality of suitable bolts 56, or any other means. Extending between the'side plates 54 is a hollow cross beam which is composed of a generally U`shaped channel 5S, which is welded, `or otherwise suitably secured, to a plate 60. The upper or hat surface 61 of the channel 58 has a channel piece 62 welded thereto, or otherwise suitably secured. lt should be understood that the channel 58 and plate 60 form a hollow cross beam which extends between the side plates 54. The channel piece 62 also extends the full width of the vibrating frame and is U-shaped so as to receive a resilient strip or a cushion support 64. As shown in Figure 5, this resilient strip has a plurality of partially circular slots 66, which are adapted to receive and hold the longitudinal rods R. These slots almost entirely enclose each of the rods so that portions 68 of the strip extend partially across the upper exposed face of the rod.

Each of the intermediate supports 52 is constructed in this same manner and all of them are provided with cushion suppports 64, as shown in Figure 5.

The intermediate flexing and clamping mechanisms A-1 and A-Z are constructed alike and each has a clamp member or bar 70 which extends transversely across the vibrating frame. As shown in Figure 3, the clamp bar is T-shaped and has on its transverse extremities plates 72 in Figure 4. The ends of the clamp bar extend through appropriate openings 74 in the side plates 38 so -that the clamp bar and its associated mechanism can be adjusted vertically with respect to the vibrating trame. The plates 72 are provided with extensions 76 which are suitably apertured to receive cap screws 78. It should be understood that the cap screws merely rotate within the extensions 76 and are not threadedly engaged therewith. A sleeve 80 is loosely pinned to the shank of the cap screw below the extension 76 so that the cap screw will always stay in place on the clamp bar. The shank of the cap screw threadedly engages a bracket 82 which is secured by an appropriate number of bolts 100 to the side plates 38 of the vibrating frame. A rubber strip or facing 86 is provided on each side of the under surface of the T-shaped clamp bar so as to tit above the rods and prevent direct metal to metal contact between the rods and the clamp bar, these' rubber strips being secured to the shank of the T-shaped crossbar by appropriate connections 88.

The ends of the rods under the' flexing and supporting mechanism are supported by resilient strips 90 which are similar in detail to the resilient strips 64 on the intermediate supports 52. Y

Each of the resilient strips 90 is positioned in a U- shaped channel member 92 which is supported on appropriate transverse supporting beams 94 and 96. These beams are welded or otherwise appropriately secured to side plates 98 which are connected to the vibrating frames side plates 38 by a plurality of suitable bolts i).

The openings 74 are each closed by an appropriate panel 192 which is positioned on the inner side of the side plate 38 and is-securely clamped thereto by a washer 184. The lower edge 'of the panel is slotted at'1tl6 so that a pair of legs 108 extend therefrom. Each of the legs extends outside of the clamp bar 70 so that the bar tits in the slot 106; The washer 104'can .be pivoted' i about the shank of a threaded rod 110 and is tightly held in any desired position by a nut 112.

The panel 102 and its washer mechanism are separate from the side plates 38 and are only positioned properly over the opening 74 when the clamp bar 70 has been properly adjusted by the cap screw 78. The panel is brought down directly `over the opening against the inner surface of the side plate until the slot 106 lits around lthe clamp bar, and the washer and lug 110 are passed outwardly through the opening. The nut 112 is loosened allowing the washer to be oriented horizontally, as shown in Figure 7, whereupon the nut is again tightened forcing the extremities of the washer against the outside of the side plate 38, thus securely positioning the panel over and closing the opening 74.

ln Figure 2, each of the sections S-1, S-2 yand S-3 is provided with a plurality of longitudinally extending rods which are supported by the intermediate supports 52, each of these supportsY being substantially the same as the one shown and described in Figures 3 and 5. The two intermediate clamping mechanisms A-l and A-2 are substantially the same as shown and described with reference to Figures 4, 6 and 7. Both of these clamping mechanisms cooperate with the supporting mechanism which includes the side plates 98, as shown and described with reference to Figure 3.

The side walls 12 of the housing can be provided with appropriately sized inspection openings 113 which are located adjacent each of the clamping mechanisms A1 and A-Z, thus providing for easy access to these mechanisms during adjustment.

Rod section S-3 has a foot end mechanism F which is composed of a side bracket 114 secured adjustably to each of the side plates 38 by any suitable means such as bolt 116. The bracket 114 is mounted so as to be vertically adjustable with respect to the side plates. EX- tending between the brackets 114 on each of the side plates 38 and secured to the bottom ilange thereof is an angle 118. A supporting plate 120 is bolted or otherwise suitably secured to the inner face of each of the side plates 38. A channel piece 122 extends between and is welded to, or otherwise suitably secured, to each of the supporting plates 120. The upper face or leg of the channel piece 122 carries a channel piece 124 which supports and receives a foot end cushion support 126. This cushion support is provided with spaced apertures or holes which extend longitudinally through the body thereof so as to receive the foot end of the rods in rod section S-3. The cushion support is conned on three sides by the channel piece 12.4 and the angle 118, as shown in Figure 2. When the bolts or securing means 116 on the brackets 114 are loosened so that the brackets can be raised, the angle 118 will be raised slightly, thus allowing for the insertion or removal of the foot end cushion support 126. When the cushion support has been positioned on the channel piece 124, the angle 118 and side brackets 114 are lowered until the cushion is securely held on three sides by the angle and channel piece, at which time the bolts are tightened, thus securely and firmly holding the foot end cushion.

. The use and operation of my device is as follows:

As it is desired to handle and screen relatively heavy material and much larger sizes of feed, the conventional rod screens will not accommodate or stand up under the service required. Accordingly, ithas been found desirable to construct a vibrating rod screen with a rod deck which employs larger steel spring rods. With reference to my earlier Patent No. 2,308,572, the rods are of such a diameter that' they have suicient flexibility so that they can be exed andpositioned between their resilient supports by hand. Due to the necessity of using rodsof an increased diameter, it has been necessary to construct a rod deck which provides mechanism for automatically flexing and holding larger size rods.

,In @zich` of the Sections s-1, s-z aaa s-s, the-mas* are positioned along the intermediate supporting elements in the openings 66 in the resilient elements 64 with the clamp bars in their upper or raised position. In Figure 8 and with reference to sections S-1 and S-3, the rods are inserted in the head end and foot end, as well as beng forced into the slots 66 in the resilient elements on the adjacent intermediate supports.

The rods in the center section S-Z are laid across the two intermediate supports and forced into the notches in the rubber with the extremities of the rods being slightly above the rubber or resilient elements under the clamping bars. Figure 8 shows the rods in all three rod sections after they have been manually positioned in the various sections just prior to downward movement of the intermediate clamping mechanisms A-1 and A-Z. The clamp bars .70 are then pulled downward by the cap screws 78. The panels 102 which close the openings 74, may rest loosely on the top surface of the clamp bars 70 so as to ride downwardly therewith during the exing of the rods and secured tightly in position by the nut 112 when the clamp bar has reached the desired position. If desired, the panels may be completely removed from the openings 74 and inserted when the ,rods have the desired degree of arch or exure. All of the rubber strips 64 on the intermediate supports and the strips 90 on the end supports are molded to space the rods and it around them. The rubber strip 86 is positioned under the edges of the T-shaped ange on the clamp bar to prevent metal to metal contact. By this structure, the heavy rods can be easily positioned along the intermediate support and quickly tiexed to the desired arch without the necessity of heavy tools and accessory equipment. In addition, the rods are securely held in their arched condition and will not tend to vibrate or become loose in their mountings. The side plates 38 with the panels 102 in place, present an uninterrupted surface to the material being screened and the panels will not work free when subjected to the violent vibrating motion.

Whereas I have shown and described my invention specically and various detailed elements thereof, it should be understood that numerous modifications and alterations can be made without departing from the fundamental theme. For example, I have shown three rod sections, S-l, S-2 and S-3; however, it should be understood that any number of rod sections can be used without departing from the spirit of my invention, as I do not intend to be limited to any specific number of sections. If the number of rod sections were increased over the three I have shown, it would require additional intermediate clamping mechanism, such as A-1 and A-2. On the other hand, the number of sections could be reduced to two so as to require only one intermediate clamping mechanism; however, I have found that three rod sections with two intermediate clamping mechanisms is the most practical arrangement. I also do not wish to be limited to any particular size of rods, even though it is understood that the unit is designed basically to accommodate what might be termed the larger size of rods. In addition, whereas I have shown the rods in each of the rod sections as being of the same size,`it should be understood that the rods can vary in size from one section to another so that various sizes of material could be screened by the different sections. It should also be understood the entire unit could easily be mounted on wheels so as to be readily movable from one location to another, and, when positioned in the desired location, secured so as to give stability in operation. Whereas I have described the unit as being primarily heavy-duty equipment, it should be understood that it can be used with dry, wet, sticky or gummy rocks and ores without materially altering or changing the basic concept of the invention. With these changes and many others in mind, which are obvious, I desire that my invention be unrestricted except by the appended claims.

I claim: l. A vibrating screen deck structure including side frame members and a transverse connecting screen deck, said deck being composed of transverse connecting members extending between the side frame members and a plurality of screen sections, each screen section including a plurality of longitudinally extending relatively flexible rods and positioning members therefor, and adjustable arching mechanism movable in relation to said positioning members for uniformly exing said rods into a predetermined arched condition said positioning members including end positioning members for positioning the opposite ends of said rods and intermediate positioning members fof positioning intermediate portions of said rods, said arching mechanism comprising a clamping member extending laterally between and having its opposite ends slidably, adjustably mounted in said side frame members and movable into -position in contact with the opposed ends of adjacent screen sections to clamp the opposed rod ends of said section against the end positioning members associated therewith.

2. In a screening mechanism, a screen deck structure, vibrating mechanism for vibrating said structure, said structure including side frame members and a transverse connecting screen deck, said deck being composed of transverse connecting members extending between the side frame members and a plurality of screen sections, each screen section including a plurality of longitudinally extending relatively exible rods and supports therefor, and adjustable arching mechanism movable in relation to said supports for flexing said rods in unison into a predetermined arched condition said supports including an intermediate support positioned beneath the intermediate portion of said rods and end supports positioned beneath the opposite ends of said rods at points beneath the upper surface of said intermediate supports, said arching mechanism including a clamping member extending between said side frame members and having its opposite ends slidably, adjustably mounted in said side frame members, said clamping member being movable downwardly into contact with the opposed ends of rods of adjacent screen sections to clamp said rod ends downwardly against the end supports therebeneath, said clamping members including portions extending outwardly beyond said side frame members for manual adjustment of said clamping members.

3. In a screening mechanism, a base, a housing mounted on said base, a screen deck structure resiliently mounted on said housing, vibrating mechanism mounted on said housing and associated with said screen deck structure for vibrating the same, said structure including side frame members and a transverse connecting screen deck, said deck being composed of transverse connecting members extending between the side frame members and a plurality of screen sections, each screen section including a plurality of longitudinally extending, relatively ilexible rods, and adjustable arching and supporting mechanism for flexing and supporting said rods in unison into a predetermined arched condition, said mechanism including at least one intermediate support and end supports for said rods extending between and fixed to the side frame members, said mechanism including an adjustable pressure member adjustably mounted between said side frame members so as to be movable relative thereto and relative to said supports, openings in said side frame members through which said adjustable member extends, and manually operable means accessibly positioned adjacent said openings between the side frame members and the housing for actuating said adjustable member.

4. In a screening mechanism, a base, a supported housing mounted on said base, a screen deck structure resiliently mounted on said housing, a vibrating mechanism mounted on said housing and associated with said screen deck structure for vibrating the same, said structure including side frame members and a transverse connecting screen deck, said deck being composed of transverse connecting members extending between the side frame members and a plurality of screen sections, each screen section including a plurality of longitudinally extending, relatively flexible rods, and adjustable arching and supporting mechanism for flexing and supporting said rods in unison into a predetermined arched condition, said mechanism including an intermediate support and end supports for said rods extending between and fixed to the side frame members, said mechanism including a pressure member adjustably mounted between said side trame members above one of said end supports so as to be movable relative thereto in a direction generally perpendicular to the plane of the screen section, openings in said side frame members through which said adjustable member exetnds, and manually operable means accessibly positioned adjacent said openings between the side frame members and the housing for actuating said adjustable member, said rods being, in relation to said supports,

manually insertable and removable in their unflexed condition prior to flexing by said adjustable member.

5. In a screening mechanism, a base, a housing mounted on said base, a screen deck structure resiliently mounted on said housing, vibrating mechanism mounted on said housing and associated with said screen deck structure for vibrating the same, said structure including side frame members and a transverse connecting screen deck, said deck being composed of transverse connecting members extending between the side frame members and a plurality of screen sections, each screen section including a screening' medium, and adjustable arching and supporting system for flexing and supporting said medium in an arched condition, said mechanism including an intermediate supporting structure extending between and xed to the side frame members and end supports for said medium, at least one of said end supports having at least a portion thereof adjustably mounted between the said ame members so as to be movabley relativeither'eto; openings inl said side frame members vthrough which said rods and positioning members therefore, and adjustableV arching mechanism movable in relation to said positioning member for uniformly llexing saidrods into a predetermined arched condition, said positioning members including end positioning'members for positioning the opposite ends of saidrods and intermediate positioning members for positioning intermediate portionsof said rods, said arching mechanism comprising a clamping member extending laterally between and having its opposite ends slidably, adjustably mounted in said side frame members and'rnovable into position in contact with the opposed ends of adjacent screen sections to clamp the opposed Y rod ends of said section against the end positioning members associated therewith,` said clamping member having secured thereto a facing of exible material positioned for contact with said rod endsV when said clamping member is in rod-'flexing position.

References Cited in the file of this patent UNITED STATES PATENTS 327,050 Wulfert Sept. 29, 1885 810,682 Shafer Jan. 23, 1906 2,308,572 Symons Jan. 19, 1943 2,374,775 Parks May 1, 1945 2,456,075 Newhouse Dec. 14, 1948 

